Improvement in boiler-furnaces



J. L. WINSLOYV. Boiler-Furnace.

No. 203,688., Patented May 14, 187-8.

UNITED STATES PATENT OFFICE.

JOSEPH L. WINSLOW, OF PORTL AND, MAINE.

IMPROVEMENT l N BOILER-FURNACES.

Specification forming part of Letters Patent No. 203,688, dated May 14,1878; application filed I June 23, 1877.

To all whom it may concern:

Be it known that I, J osnPH L. WINSLOW, of Portland, in the county ofCumberland and State of Maine, have invented certain new and usefulImprovements in Furnace-Boilers; and I do hereby declare that thefollowing is afull, clear, and exact description thereof, which willenable others skilled in the art to which it appertains to make and usethe same, reference being had to the accompanying drawings, and toletters of reference marked thereon, which form a part of thisspecification.

Figure 1 is a perspective of my invention, with parts broken out. Fig. 2is a front view. of the bridge-wall, with pipes, deflector, and inclinedplate. Fig. 3 is a modified form of deflector.

Same letters show like parts.

The purpose of my invention is to produce certain new and usefulimprovements in boiler and other furnaces, whereby the combustion offuel is rendered more nearly perfect, and whereby smoke and gases whichusually escape are wholly or partially consumed.

at is the grate and fire-potb is the bridgewall. 0 is a pipe, perforatedwith numerous holes, to admit air into the flames as they pass up theinclined surface d. e is a deflector, by which the flames and otherproducts of combustion pass while making their exit through the aperturef. g is an inclined plate over an air-chamber, h. 4 is a slotor slotsopening into the space or spaces j under the inclined surface d.

I will now proceed to describe the objects for which the several devicesreferred to are employed. Flame, smoke, and gases enter the flaringspace 75, formed by the deflector e and the inclined surface (1. Acrossthe mouth of this space extends the perforated pipe 0, for the purposeof admitting fresh air and oxygen into the smoke, &c., passing intothespace.

By the deflector e, the space between the boiler and the bridge-wall iscontracted, and the air and smoke is held a greater time, and thusheated to an increased temperature, before passing the deflector, andthus a more perfect combustion takes place. This is the fact whetheroutside air is injected or not. The deflector improves the efficacy ofthe bridge-wall.

Fig. 3 shows a form of this deflector, which may be of iron, made in twopieces, and supplied with numerous perforations, and made hollow, sothat as the smoke and flames pass through the space It air can beinjected into the same through these holes. Z shows pipes through whichair is conducted into the hollow perforated deflector. The air, beingheated within the hollow of the deflector, is in the best state forbeing mingled with the products of the imperfect combustion on the gratea.

If desired, the upper part of the deflector may be made of iron and thelower half of fire-brick or clay.

The form of the deflector may render the use of the pipe unnecessary.

The slots i admit flame and heat to pass under the inclined plate orsurface 01. This secures a more complete heating of said surface, byreason of its having heat and flames on both sides, and, when theperforated deflector is used, very much improves its efficient action.

Into the air-chamber h, as also into the pipe 0 andthe perforateddeflector, whether these devices be used separately or conjointly, airfrom without is forced by convenient means.

When the air is admitted into the chamber h, it passes through theperforation in the inclined plate 9 into the flame, &c., at an acuteangle with the direction of the flames as they are swept by the draft.This prevents, when united with the force employed to inject the air,the said air from passing immediately up over the bridge-wall and up theinclined surface d.

The air thus introduced, being forced in a general direction contrary tothe direction of the draft, has time to mingle with the smoke and gases,and better to produce the desired effect in the combustion.

By the use of either or all conjointly of the above-described devicescombustion can be rendered nearly perfect, and little or no visible orperceptible escape of smoke from chimney will take place.

Furthermore, to obtain a given degree of heat, much less draft under thegrate is required.

In speaking in this specification of the air being forced or injected, Imean that a forcewith the bridge-wall provided with slots 0' and spacesj, substantially as described.

3. The combination of the inchncd perforated plate g, air-chamber h, capor deflector 6, made, hollow, surface d, with proper air-conductingtubes, as herein set forth.

4. The inclined perforated plate 9, air-chamber h, slots 2', and spacesj, With the bridge wall proper air-conducting tubes, as herein fdescribed. 7

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

JOSEPH L. WIN SLOW.

Witnesses HERBERT G. BRIGGS,

F. A. MOTLEY.

